The inaction of waiting was beginning to get on Whitey's nerves--and would have affected Injun's if he'd had any.

At that, they had not been waiting very long, though they did not know it.
"It must be getting near.

I'll listen again," said Whitey.
Whitey again placed his ear to the track, then looked up blankly.

"It's stopped," he said, "Mebbe there's been an accident." Injun knew a good deal about plains and woods, and animals and birds, but was rather in awe of trains.

He gazed at Whitey's face, which wore the same blank look as his own, and ventured no opinion.